Question

Find length of a cuboid surface area 256cm² given h=12 b=5

Answer 1

Answer:

Hey mate here is your answer....

Step-by-step explanation:

As area = l×b×h....

thats why you have to divide( 12×5) from the total area I.e., 256cm²

Answer 2

Step-by-step explanation:

Given Surface area of a cuboid = 256 cm²

h = 12 cm

b = 5 cm

l = ?

Formula

Surface Area of cuboid = 2(lb + bh + lh )

256 = 2[(L×5) + (5×12) + (L×12)]

256 = 2(5L + 60 + 12L)

256/2 = (60 + 17L)

128 = 60 + 17L

17L = 68

L = 68/17

L = 4 cm